android Activity 详述 demo

package com.jcdh.jcli.activitydemo; import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import android.view.View; public class MainActivity extends AppCompatActivity { private String TAG = "MainActivity"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Log.i(TAG, "onCreate"); } public void moveToSecondActivity(View view) { Intent intent = new Intent(MainActivity.this,SecondActivity.class); intent.putExtra("boolean_key", true); intent.putExtra("string_key", "string_value"); startActivity(intent); } @Override protected void onResume() { super.onResume(); Log.i(TAG, "onResume"); } @Override protected void onStart() { super.onStart(); Log.i(TAG, "onStart"); } @Override protected void onPause() { super.onPause(); Log.i(TAG, "onPause"); } @Override protected void onStop() { super.onStop(); Log.i(TAG, "onStop"); } @Override protected void onRestart() { super.onRestart(); Log.i(TAG, "onRestart"); } @Override protected void onDestroy() { super.onDestroy(); Log.i(TAG, "onDestroy"); } }